Maybe this is too broad an umbrella (and I have no idea if any other ideas were already agreed upon), but would a generic "Elseworlds/Infinties/Universe Cross-Over" work?
And I don't mean Infinities within the SW universe. So, for example, you could do Obi Wan as a knight of the round table, Tarkin as a German WWII officer, Boba Fett as Batman or Snake-Eyes as a Jedi and Storm Shadow as a Sith.
Thoughts?